#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include "LinkStack1.h"
#include "LinkStack2.h"

int main(){
	LinkStack *cha;
	cha = (LinkStack*)malloc(sizeof(StackNode));
	do{
		cha=turn();
	}while(cha == NULL || !calculate(cha));
	return 0;
}

 
